Car repair car does not destroy the car

Some friends like to do their own repairs to the car for various reasons. The better technology can solve some simple problems and save a car repair money. Those who are ignorant of the facts are misled by their own ideas. The effect is often counterproductive, and the original small problems are made into big problems. Pay attention to the following questions and don't change the car to a car.

First, blindly remove the engine thermostat error: Demolition of the thermostat is a lot of old drivers love to do the old car, because the old car cooling system fouling, so that heat dissipation decreased, the internal pipeline due to thinning, so the water The flow becomes smaller and the engine temperature is too high.

If the thermostat is blindly dismantled due to high engine temperatures, the cooling fluid goes through a large cycle, the cooling rate is indeed faster than before, and the number of fan operations is also reduced. It should be advantageous for old cars. Because the design of water tanks is relatively complicated for new cars, the removal of thermostats will destroy the original circulation route. Therefore, do not remove the thermostats easily.

Dismantling the thermostat has a great disadvantage to the engine, the engine warm-up time becomes longer, the engine is often working at a low temperature, the power is reduced, the wear is accelerated, the fuel consumption is increased, and the abrasion hazard is no less than the harm caused by the boiler to the engine.

Correct practice: If the engine temperature is still high after troubleshooting or replacing the engine thermostat, other parts of the cooling system should be checked and the thermostat not removed.

Second, the engine water temperature is not repair error: If the water temperature is high, do everything possible to find the reason, and when the water temperature is low, it is considered normal. The low water temperature of the engine for the generation of the automobile will cause great harm, resulting in insufficient combustion of the mixture, lower power, increased fuel consumption, poor lubrication, and excessive emissions.

The right approach: Some people think that engine temperature is not afraid of high when driving. In fact, when the engine temperature is low, the danger is also great. Cars should be driven according to the normal temperature specified in the vehicle's instruction manual to ensure the service life of the engine. The reason why the engine's water temperature is too low is not as complex as the water temperature is high. Generally, the thermostat is damaged or the cooling fan often turns.

Third, the tighter the Water Pump fan belt, the better wrong: Some people think that the tighter the belt, the better. In fact, too tight a belt will not only make it stretch or break, shorten the service life of the belt, but also lead to deformation and bending of the generator shaft and the water pump shaft and early damage of the bearing due to excessive tension.

Correct practice: The tightness of the car engine fan belt should meet the technical requirements, and the normal belt assembly is suitable when the deflection is 10-15mm.

So how to adjust the tightness?

1. Releasable fixing nut with tensioning wheel structure, twisting adjusting screw, and moving the tensioning wheel up and down to achieve the required tightness.

2. The fan and generator share a belt-driven, movable generator support, which changes the position of the pulleys to achieve the desired tightness.

3, the pulley consists of two halves, first loosen the fixing bolts, and then rotate the adjustable half pulley, so as to change the width of the synthesized pulleys, so as to lift the V-belt, to achieve the desired degree of tightness.

Fourth, the engine with idling heating error: When using idling heating, due to the lower speed, the oil pump can not quickly press the lubricant into the lubrication surface, the oil pressure is low, so that the ENGINE PARTS in the dry friction or semi-dry Working under friction conditions; due to poor atomization of fuel at low temperatures, the unburned fuel (mixed gas) can be pumped into the crankcase and the oil film on the cylinder wall can be washed away, which will also accelerate the wear of the machine.

The right approach: After the engine is started for a few seconds, the application is warmed up quickly to improve the lubrication conditions of the engine.

Fifth, to the tire bolt nuts and oil error: In the wheel maintenance, a small number of private owners in order to prevent the bolts and nuts on the wheel rust, ingenuity to install the bolts and nuts are painted with oil, but do not know this approach is not only wrong, but also to drive Security poses some hidden dangers.

After bolts and nuts are tightened, they have self-locking characteristics. After the lubricating oil is applied, the self-locking coefficient between the two becomes smaller and the self-locking performance decreases. When the car is driving at a high speed, bolts and nuts are easily loosened or even dropped off, causing an accident.